This site has 70k reviews is more than all the casinos together. Is. clear that he buys reviews.
The biggest casino dont have near that:
Stake only has 2k
Bc.game 913
GG poker 1.2k
Roobet 997
Is one of the things you need to check when you play the review ratio and their traffic.
All the sites above our biggers than the Cbet.gg
And luckily people who voted 5 star didn't get paid to leave reviews so we can instantly see the bad ones.
But this is the problem with every review site (even with wish or amazon products etc), people can just buy themselves good reviews. I am guessing there's no easy solution and all we can do is to sherlock traffic data and combine that like you did. Working and fair review site would be a holy grail of e-commerce inventions, but i don't think that would work even with digital id solution.